Bennett TPA1212 12 x 12 Trim Plane Assembly Bennett trim planes are made of high quality 304 stainless steel and remain strong and rigid, even in the most challenging situations. Each trim plane assembly includes a trim plane, backing plate and hinge for one side of the boat. Trim Tab Plane Features Standard Trim Assembly Fits boats 17 - 30 12 Wide by 12 Deep 304 Stainless Steel Bennett Part TPA1212 Yamaha Part 6BT500689300 California Residents WARNING Cancer and Reproductive Harm - P65Warnings.